2007 INFINITI QX56 differential

FRONT FINAL DRIVE ASSEMBLY
FFD-29
< SERVICE INFORMATION >
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10. Install side bearing adjusters into gear carrier.
11. Apply differential gear oil to the side bearings, and install the dif-
ferential case assembly with the side bearing outer races into
the gear carrier.
CAUTION:
Do not reuse side bearing outer race when replacing side
bearing inner race (replace as a set).
12. Install the side bearing caps with the matching marks aligned.
NOTE:
Do not tighten at this step. This allows further tightening of side
bearing adjusters.
13. Tighten each side bearing adjuster alternately turning drive gear.
14. Check and adjust tooth contact, backlash, drive gear runout and total preload torque.
Recheck above items.
• After adjusting tooth contact and backlash secure side bearing
adjuster with screws and tighten side bearing cap bolt to the
specified torque.
15. Apply multi-purpose grease to the lips of the new side oil seal. Then drive the new side oil seal in evenly to
the gear carrier using suitable tool.
CAUTION:
• Do not reuse side oil seal.
• Do not incline the new side oil seal when installing.
• Apply multi-purpose grease to the lips of the new side oil seal.
SPD527
PDIA0700E
SDIA2265E
SDIA2263E

SERVICE DATA AND SPECIFICATIONS (SDS)
FFD-31
< SERVICE INFORMATION >
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SERVICE DATA AND SPECIFICATIONS (SDS)
General SpecificationINFOID:0000000003532595
Inspection and AdjustmentINFOID:0000000003532596
DRIVE GEAR RUNOUT
Unit: mm (in)
SIDE GEAR CLEARANCE
Unit: mm (in)
PRELOAD TORQUE
Unit: N·m (kg-m, in-lb)
BACKLASH
Unit: mm (in)
COMPANION FLANGE RUNOUT
Unit: mm (in)
SELECTIVE PARTS
Drive Pinion Height Adjusting Washer
Applied modelVK56E
Final drive modelM205
Gear ratio3.357
Number of teeth (Drive gear/Drive pinion) 47/14
Differential gear oil capacity (Approx.)
1.6 (3 3/8 US pt, 2 7/8 Imp pt)
Number of pinion gears2
Drive pinion adjustment spacer type Collapsible
Item Runout limit
Drive gear back face 0.08 (0.0031) or less
Item Specification
Side gear back clearance (Clearance between side gear and dif-
ferential case for adjusting side gear backlash)0.20 (0.0079) or less
(Each gear should rotate smoothly without excessive resistance
during differential motion.)
Item Specification
Drive pinion bearing preload torque 2.3 - 3.4 (0.23 - 0.35, 21 - 31)
Total preload torque
(Total preload torque = drive pinion bearing preload torque + side
bearing preload torque).2.98 - 4.76 (0.31 - 0.48, 27 - 42)
Item Specification
Drive gear to drive pinion backlash 0.12 - 0.20 (0.0050 - 0.0079)
Item Runout limit
Companion flange face 0.10 (0.0039) or less
Companion flange inner side 0.13 (0.0051) or less

TERMINOLOGY
GI-51
< SERVICE INFORMATION >
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Exhaust gas recirculation control-BPT
valveEGRC-BPT valve BPT valve
Exhaust gas recirculation control-solenoid
valveEGRC-solenoid valve EGR control solenoid valve
Exhaust gas recirculation temperature sen-
sor
EGRT sensor Exhaust gas temperature sensor
EGR temperature sensor
Flash electrically erasable programmable
read only memoryFEEPROM ***
Flash erasable programmable read only
memoryFEPROM ***
Flexible fuel sensor FFS ***
Flexible fuel system FF system ***
Fuel pressure regulator *** Pressure regulator
Fuel pressure regulator control solenoid
valve*** PRVR control solenoid valve
Fuel trim FT ***
Heated Oxygen sensor HO2S Exhaust gas sensor
Idle air control system IAC system Idle speed control
Idle air control valve-air regulator IACV-air regulator Air regulator
Idle air control valve-auxiliary air control
valveIACV-AAC valve Auxiliary air control (AAC) valve
Idle air control valve-FICD solenoid valve IACV-FICD solenoid valve FICD solenoid valve
Idle air control valve-idle up control sole-
noid valveIACV-idle up control solenoid valve Idle up control solenoid valve
Idle speed control-FI pot ISC-FI pot FI pot
Idle speed control system ISC system ***
Ignition control IC ***
Ignition control module ICM ***
Indirect fuel injection system IFI system ***
Intake air IA Air
Intake air temperature sensor IAT sensor Air temperature sensor
Knock *** Detonation
Knock sensor KS Detonation sensor
Malfunction indicator lamp MIL Check engine light
Manifold absolute pressure MAP ***
Manifold absolute pressure sensor MAPS ***
Manifold differential pressure MDP ***
Manifold differential pressure sensor MDPS ***
Manifold surface temperature MST ***
Manifold surface temperature sensor MSTS ***
Manifold vacuum zone MVZ ***
Manifold vacuum zone sensor MVZS ***
Mass air flow sensor MAFS Air flow meter
Mixture control solenoid valve MC solenoid valve Air-fuel ratio control solenoid valve
Multiport fuel injection System MFI system Fuel injection controlNEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM

IDX-3
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IDX
ALPHABETICAL INDEX
Brake fluid level ................................................. MA-28
Brake hydraulic line ........................................... BR-12
Brake inspection ................................................ MA-28
Brake lines and cables inspection ..................... MA-28
Brake master cylinder ....................................... BR-15
Brake switch ...................................... EC-572, EC-584
BRK/SW - Wiring diagram ............................... EC-585
Bulb specifications ........................................... LT-148
Bumper, front ...................................................... EI-13
Bumper, rear ....................................................... EI-15
C
Cabin air filter .................................................... MA-21
Camshaft ........................................................... EM-46
Camshaft inspection .......................................... EM-49
Camshaft position sensor (PHASE) ................ EC-369
CAN - Wiring diagram .............. EC-157, AT-93, AT-94
CAN communication EC-32, EC-156, EC-159, TF-112,
RSU-6
Canister-See EVAP canister ............................. EC-36
Center case (Transfer) ....................... TF-154, TF-167
CHARGE - Wiring diagram ............................... SC-19
Charging system ............................................... SC-17
Chassis and body maintenance ........................ MA-21
Chassis and body maintenanceSchedule 1 ........ MA-8
Chassis and body maintenanceSchedule 2 ...... MA-10
CHIME - Wiring diagram ..................................... DI-41
Circuit breaker ................................................... PG-17
Clock ................................................................... DI-61
CLOCK - Wiring diagram .................................... DI-61
Closed loop control ............................. EC-26, EC-501
Closed loop control (Bank 1) ........................... EC-501
Closed loop control (Bank 2) ........................... EC-501
Clutch drum (Transfer) ....................... TF-154, TF-167
Clutch pressure switch (Transfer) ...... TF-154, TF-167
Coil spring (front) ............................................. FSU-10
Collision diagnosis .......................................... SRS-53
Combination lamp, front, removal and installation . LT-
25
Combination lamp, rear, removal and installation .. LT-
101
Combination meter ................................................ DI-5
Combination switch ............................................ LT-79
COMBSW - Wiring diagram ............................... LT-79
COMM - Wiring diagram ................................... AV-94
COMPAS - Wiring diagram ................................. DI-24
Compass ............................................................. DI-23
Component Location (auto A/C) ...................... ATC-38
Compressor clutch removal and installation . ATC-180
Compressor mounting ................................... ATC-179
Compressor precaution ................................... ATC-11
Compressor special service tool ..................... ATC-14
Condenser ..................................................... ATC-184
Connecting rod .................................................. EM-96
Connecting rod bearing clearance .................... EM-96
Connecting rod bushing clearance .................... EM-96
Console box - See Instrument panel ................... IP-10
CONSULT for VDC ......................................... BRC-27
CONSULT general information ........................... GI-37
CONSULT-II for engine ................................... EC-118
Control units (terminal arrangement) ................. PG-71
Control valve (A/T) ............................................. AT-36
Control valve (Transfer) ...................... TF-154, TF-167
Converter housing installation ............ AT-240, AT-244
COOL/F - Wiring diagram ................................ EC-507
Coolant mixture ratio ......................................... MA-12
Coolant replacement ............................ CO-10, MA-13
Cooling circuit (engine) ........................................ CO-8
Cooling fan ........................................................ CO-17
Cooling fan control ........................................... EC-504
Cooling fan motor ............................................ EC-513
Cooling unit (A/C evaporator) ....... ATC-157, ATC-186
Corrosion protection ......................................... BL-157
Crankcase ventilation system - See Positive crankcase
ventilation .......................................................... EC-46
Crankshaft ......................................................... EM-79
Crankshaft position sensor (POS) ................... EC-362
Crash zone sensor .......................................... SRS-48
CUR/SE - Wiring diagram ... EC-522, EC-529, EC-536,
EC-543
Cylinder block .................................................... EM-78
Cylinder block boring ......................................... EM-99
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D/LOCK - Wiring diagram ................................... BL-19
Data link connector for Consult ......... EC-120, EC-132
Daytime light system .......................................... LT-27
Daytime running light - See Daytime light system .. LT-
27
DEF - Wiring diagram ....................................... GW-74
Diagnosis sensor unit ...................................... SRS-51
Diagnostic trouble code (DTC) for OBD system . EC-9,
EC-54
Diagnostic trouble code (DTC) inspection priority chart
EC-91
Differential carrier assembly ............................ RFD-15
Differential gear oil replacement ........................ MA-26
Dimensions ......................................................... GI-51
Direct clutch solenoid valve ................ AT-143, AT-145
Display and amp.assembly .............................. ATC-59
Display Control Unit ........................................... AV-83
Display Unit ....................................................... AV-83
Dome light - See Interior lamp .......................... LT-110
Door glass .......................................... GW-62, GW-65
Door lock .......................................................... BL-121
Door mirror lamp ............................................... LT-110
Door trim .............................................................. EI-32
Door, front ........................................... BL-117, GW-62
Door, rear ........................................... BL-117, GW-65
Drive belt ........................................................... EM-13
Drive chain (Transfer) ......................... TF-149, TF-176
Drive pinion diff. inspection .............................. RFD-18
Drive shaft (rear) ................................................ RAX-7
Driver air bag ................................................... SRS-39
DTC work support ............................................ EC-128
DTRL - Wiring diagram ....................................... LT-31

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPR-3
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NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003532575
Use the chart below to help you find t he cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
PR-4
(front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
FFD-6, "
NVH Troubleshooting Chart
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RFD-7, "
NVH Troubleshooting Chart
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FAX-4, "
NVH Troubleshooting Chart
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RAX-4, "
NVH Troubleshooting Chart
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FSU-4, "
NVH Troubleshooting Chart
"
RSU-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
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BR-4, "
NVH Troubleshooting Chart
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PS-5, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Uneven rotation torque
Rotation imbalance
Excessive run out
Differential
Axle
Suspension
Tires
Road wheel
Drive shaft
Brakes
Ste eri ng
Symptom Noise
×××××××××××
Shake ×××××××
Vibration ××××××××

RAX-4
< SERVICE INFORMATION >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003532623
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
—
RAX-7RAX-7—
RAX-5—
RFD-7, "
NVH Troubleshooting Chart
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FAX-4, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
"
RSU-4, "
NVH Troubleshooting Chart
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WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
PR-3, "
NVH Troubleshooting Chart
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BR-4, "
NVH Troubleshooting Chart
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PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
DIFFERENTIAL
FRONT AXLE
FRONT SUSPENSION
REAR SUSPENSION
TIRES
ROAD WHEEL
PROPELLER SHAFT
BRAKES
STEERING
SymptomNoise×× ×× ××× ×××××
Shake× × ×× ×× ×××××
Vibration×× ××× ××× ×
Shimmy×× ×× ×× ××
Shudder×××××××
Poor quality ride or handling×× ××× ×× ×

RFD-1
DRIVELINE/AXLE
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SECTION RFD
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CONTENTS
REAR FINAL DRIVE
SERVICE INFORMATION ............................2
PRECAUTIONS ...................................................2
Precaution for Servicing Rear Final Drive .................2
PREPARATION ...................................................3
Special Service Tool .................................................3
Commercial Service Tool ..........................................6
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING .............................
7
NVH Troubleshooting Chart ......................................7
DIFFERENTIAL GEAR OIL .................................8
Changing Differential Gear Oil ..................................8
Checking Differential Gear Oil ...................................8
FRONT OIL SEAL ..............................................9
Removal and Installation ..........................................9
SIDE OIL SEAL .................................................11
Removal and Installation .........................................11
CARRIER COVER .............................................13
Removal and Installation .........................................13
REAR FINAL DRIVE ASSEMBLY ....................14
Removal and Installation .........................................14
Disassembly and Assembly .....................................15
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
32
General Specification ..............................................32
Inspection and Adjustment ......................................32

RFD-2
< SERVICE INFORMATION >
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Servicing Rear Final DriveINFOID:0000000003532597
• Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.
• Check for the correct installation status prior to removal or disassembly. When matching marks are required,
be certain they do not interfere with the function of the parts they are applied to.
• Overhaul should be done in a clean work area, a dust proof area is recommended.
• Before disassembly, completely remove sand and mud from the exterior of the unit, preventing them from
entering into the unit during disassembly or assembly.
• Always use shop paper for cleaning the inside of components.
• Avoid using cotton gloves or a shop cloth to prevent the entering of lint.
• Check appearance of the disassembled parts for damage, deformation, and abnormal wear. Replace them
with new ones if necessary.
• Gaskets, seals and O-rings should be replaced any time the unit is disassembled.
• Clean and flush the parts sufficiently and blow them dry.
• Be careful not to damage sliding surfaces and mating surfaces.
• When applying sealant, remove the old sealant from the mating surface; then remove any moisture, oil, and
foreign materials from the application and mating surfaces.
• In principle, tighten nuts or bolts gradually in several steps working diagonally from inside to outside. If a
tightening sequence is specified, observe it.
• During assembly, observe the specified tightening torque.
• Add new differential gear oil, petroleum jelly, or multi-purpose grease, as specified.